package com.yinxianren.main.study.encryptionAndDecryption;

import javax.crypto.*;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.util.Base64;

public class EncrypAES {

    //KeyGenerator 提供对称密钥生成器的功能，支持各种算法
    private KeyGenerator keygen;
    //SecretKey 负责保存对称密钥
    private SecretKey deskey;
    //Cipher负责完成加密或解密工作
    private Cipher c;
    //该字节数组负责保存加密的结果
    private byte[] cipherByte;

    public EncrypAES() throws NoSuchAlgorithmException, NoSuchPaddingException{
        Security.addProvider(new com.sun.crypto.provider.SunJCE());
        //实例化支持DES算法的密钥生成器(算法名称命名需按规定，否则抛出异常)
        keygen = KeyGenerator.getInstance("AES");
        //生成密钥
        deskey = keygen.generateKey();
        //生成Cipher对象,指定其支持的DES算法
        c = Cipher.getInstance("AES");
    }

    /**
     * 对字符串加密
     */
    public byte[] Encrytor(String str) throws InvalidKeyException,
            IllegalBlockSizeException, BadPaddingException {
        // 根据密钥，对Cipher对象进行初始化，ENCRYPT_MODE表示加密模式
        c.init(Cipher.ENCRYPT_MODE, deskey);
        byte[] src = str.getBytes();
        // 加密，结果保存进cipherByte
        cipherByte = c.doFinal(src);
        return cipherByte;
    }

    /**
     * 对字符串解密
     */
    public byte[] Decryptor(byte[] buff) throws InvalidKeyException,
            IllegalBlockSizeException, BadPaddingException {
        // 根据密钥，对Cipher对象进行初始化，DECRYPT_MODE表示加密模式
        c.init(Cipher.DECRYPT_MODE, deskey);
        cipherByte = c.doFinal(buff);
        return cipherByte;
    }

    /**
     * 主函数
     */
    public static void main(String[] args) throws Exception {
        EncrypAES de1 = new EncrypAES();
        String msg ="{\"terminalMerName\":\"黃三\",\"signMsg\":\"sdgd2\",\"returnUrl\":\"sioifhio\",\"noticeUrl\":\"http://\",\"payFee\":\"5\",\"backFee\":\"8\",\"terminalMerId\":\"M201002-1127\",\"bizType\":\"3\",\"charset\":\"utf-8\",\"signType\":\"MD5\",\"merId\":\"M201001\",\"merOrderId\":\"2019ZX193\",\"bankCardName\":\"黃三\",\"userShortName\":\"黃三\",\"identityType\":\"1\",\"identityNum\":\"350425198606776667\",\"bankcardType\":\"1\",\"bankCardNum\":\"6216600100071122667\",\"bankCardPhone\":\"15117007672\",\"province\":\"450000\",\"city\":\"450500\",\"address\":\"北京香山口\",\"amount\":\"20\",\"smsCode\":\"111111\",\"bankCode\":\"123\",\"validDate\":\"321\",\"securityCode\":\"213\",\"backCardPhone\":\"12345678676\",\"backBankCode\":\"ABC\",\"backCardNum\":\"16895644561677\",\"bankCardType\":\"2\",\"originalMerOrderId\":\"moi201906210007\",\"cizType\":\"EX1001\",\"merchantType\":\"00\",\"terminalMerName\":\"黃三\",\"phone\":\"123165464\",\"bankaccProp\":\"0\",\"cardHolderName\":\"黃三\"}";
        byte[] encontent = de1.Encrytor(msg);
        byte[] decontent = de1.Decryptor(encontent);
        System.out.println("明文是:" + msg);
        System.out.println("加密后:" + new String(encontent));
        System.out.println("解密后:" + new String(decontent));
    }
}


class JavaURLDecoderAndEncoder{
    public static void main(String[] args) throws Exception {
        String tradeInfo="{\"terminalMerName\":\"黃三\",\"signMsg\":\"sdgd2\",\"returnUrl\":\"sioifhio\",\"noticeUrl\":\"http://\",\"payFee\":\"5\",\"backFee\":\"8\",\"terminalMerId\":\"M201002-1127\",\"bizType\":\"3\",\"charset\":\"utf-8\",\"signType\":\"MD5\",\"merId\":\"M201001\",\"merOrderId\":\"2019ZX193\",\"bankCardName\":\"黃三\",\"userShortName\":\"黃三\",\"identityType\":\"1\",\"identityNum\":\"350425198606776667\",\"bankcardType\":\"1\",\"bankCardNum\":\"6216600100071122667\",\"bankCardPhone\":\"15117007672\",\"province\":\"450000\",\"city\":\"450500\",\"address\":\"北京香山口\",\"amount\":\"20\",\"smsCode\":\"111111\",\"bankCode\":\"123\",\"validDate\":\"321\",\"securityCode\":\"213\",\"backCardPhone\":\"12345678676\",\"backBankCode\":\"ABC\",\"backCardNum\":\"16895644561677\",\"bankCardType\":\"2\",\"originalMerOrderId\":\"moi201906210007\",\"cizType\":\"EX1001\",\"merchantType\":\"00\",\"terminalMerName\":\"黃三\",\"phone\":\"123165464\",\"bankaccProp\":\"0\",\"cardHolderName\":\"黃三\"}";
        //加密
        String encode = URLEncoder.encode(tradeInfo, "UTF-8");
        String encodeANdBase64= new String(Base64.getEncoder().encode(encode.getBytes()));
        System.out.println("报文加密后："+encodeANdBase64);

        //解密
        String tradeInfoDecode = new String(Base64.getDecoder().decode(encodeANdBase64.getBytes()));
        String decode = URLDecoder.decode(tradeInfoDecode,"UTF-8");
        System.out.println("报文解密后："+decode);
    }





}
